Fuse holder



JQHAMMERLY FUSE HOLDER Filed Sept. 14, 1940 INVENTOR Jiermazz Jim/nary RNEY Patented May 6,- 1941 FUSE nomsa Herman J. Hammerly, Plainville, Conn, assignor to The Trumbull Electric Manufacturing Com-' pany. Piainville, Conn, a corporation of Con-- necticut Application September 14, 1940, Serial No.356fl8ii (Cuzco-134) 9 Claims.

This invention relates to what are commonly called clips or holders for fuses or protectiverelays. j

The main object is to provide holders for securely clamping the ends of cylindrical or cartridge type fuses so that they cannot work loose;

A special object is to provide a rugged type of structure the body of which can be stamped from strip or sheet metal such as brass, copper or bronze.

Another object is to provide a device capable of exerting great pressure on a fuse end.

The U-shaped body of the holder is principally formed from strip or sheet stock out off and bent to shape to receive the end of a fuse and.

reinforced by one or more transverse bar members which connectthe opposite side arms of-the v 1 holder and supportthe endoi' the fuse." The fuse may be clamped in the holder in a number. of'ways bymeans of an adjustable-member. s

Fig. l is a perspective view of a fuse with blade tips and holders involving one form of my invention. r e

Fig. 2 is an exploded perspective showing parts of the holder of Fig. 1.

Fig. 3 is a transverse sectional view of the cam of the fuse holders.

between thescrew-and the wedge H, or both, is made looseienough to permit properclamping motion of the wedge toward the surface of an inserted fuse end upon tightening of the screw. In this-action, the wedge bears on surface I! of the arm II. In order to facilitate retraction of the wedge I provide a tongue 20 in the slot ll of the wedge which extends into the groove 2| inthe screw II."

Fig. 4 is an end view of a holder for a fuse V and up the side arms Ii and It so that the bends are across the grain. These sides are shaped to support the end ll of the fuse and the wedge ll of the clamping device. I

The side arms II and I! are connected by one or more wires or bars II which are preferably riveted over so as to tie the arms together and reinforce the holder. These ties also serve to support the end I! of the fuse. above the bottom of base It so that a screw or bolt connection can 7 be made underneath the fuse, and so that 'added air circulation is obtained.

The wedge II is formed of sheet metal rolled of the holder. The screw threaded engagement of the screw it in the base, or the engagement The form shown in Figs. 4 and 5 is designed to accommodate a cylindrical or ferrule end 23 of a fuse. In this case a tapered headed screw 24 is mounted in the lug 2B which extends from the arm 20 of the holder. The other arm 21 engages the' fuse end at a point less than 180 away from thepoint of engagement of the screw head so'tha'tthe" screw when tightened draws thefuse end down-against the cross bar-Z8. The a .flanged piece- 1! serves to limit the endwise movement of the fuse.

The form shown in Fig. 6 has a camh'eaded I member lll eccentrically mounted in the lug Ii on the pivot 32 sothat as it is turned it is forced nearer to or further from the fuse end (not shown). A stop 33 permits rotation of the cam head slightly beyond the position in which the eccentric surface most closely approaches the clamping wall on the base, thus locking the cam in clamped position when a fuse is inserted and the cam isturned against the stop. The support is suillciently resilient to permit the head 3| to lock into place so that it will not work loose accidentally.

In this form the arm 34 not only serves as an abutment for one side of the fuse end but it also has a binding clamp ll which facilitates attachment of a conductor.

It will be seen that each form of construction is simple but inexpensive and yet affords a rugged and effective holder.

I claim:

1. A sheet metal fuse holder with a U-shaped body portion for receiving the end of a fuse, a transverse bar extending between the arms of said U-shaped body portion for reinforcing the side arms of the body portion and for supporting and seating the fuse end and a wedge member" ad- .iustable' on the body portion and adapted to fintoa tubular form and provided with a hole it in, the top and a slot l1 in the bottom. to receive the clamp screw it which screws into. the base clamp the fuse end against the body portion.

2. A sheet metal fuse holder with a U-shaped body portion for receiving the end of a fuse, a cross bar connecting the arms of said U-shaped body portionfor'reinforcing' the body portion and for supporting the end of the fuse and a clamping member adapted to be moved into the space between the arms 'of' the body portion so that a portion ther'eof engages and'clamps the screw means for moving said clamping member against the end of the fuse whereby said fuse end is clamped against one arm of the body portion. a

4. A fuse holder of sheet metal of U-shape having a lug at one side with a wedge member pivoted thereto and having an eccentric camlike wall adapted to be clamped against the side of the end of a fuse by rotating the wedge member.

5. A fuse holder of sheet metal of U-shape having a lug at one side with a wedge member pivoted thereto and having an eccentric camlike wall adapted to be clamped against the side of the end of a fuse by rotating the wedge member and a stop for limiting the rotation of the wedge member. a a

6. A fuse holder of sheet metal of U-shape having a lug at one side with a wedge member shaped body portion, a lateral lug on one end of the body portion having an opening, a wedgeshaped member, and a pin eccentrically mounted on the smaller end of said member and rotatable in said opening, said member being formed with a slot in its larger end for receiving a tool to rotate said member.

'8. A fuse holder of sheet metal having a U- shaped body portion, a laterally extending lug on the end of each arm of said body portion, a wedge-shaped member pivoted on one of said lugs and having an eccentric cam-like wall adapted to be clamped against the side of the end of a fuse by rotating said wedge member, and a member movablymounted on the other arm of the body portion for clamping a conductor wire.

9. A clamp for the end of an electrical cartridge fuse including a base of sheet metal bent into substantially U-shape, the legs of the U extending vertically and being spaced apart sumciently to receive the end of a fuse, a rivet extending between the legs and secured to each leg above but near the bight of the U for reinforcing the base and for supporting the end of a fuse in spaced relation from the bottom of the bight, a fuse contacting face on the inside of one'of the legs, clamping means for forcing an inserted fuse end toward said rivet and toward said contacting face, said means having a toolengaging portion manipulable from a vertical position adjacent the ends of the legs of the base, and a bearing for said clamping means on the leg opposite the fuse contacting face.

HERMAN J. HAMMERLY. 

